
experience are used to solve both the credit (blame) assignment problem
(i.e.,
the
choice of parameters to change), as well as to determine by how much they should be
changed.
This evaluate, blame, adjust cycle is repeated until the designer is satisfied with
the design. This approach can be, but need not be, constrained to be a hill-climbing
problem.
The Air Cylinder designer we observed used something like this method to "tweek"
the design slightly, by propagating small changes in dimensions backwards and
forwards along the longitudinal axis of the air-cylinder until the desired state was
reached.
The changes were very small and didn't resul ...